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(No Model.)

' J. L. HAYWARD.

ROOK. PULVBRIZER.

Patented Aug. 4, 1885.

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W/TNESSES N. PETERS. Pholo-Lhngrapher, Wzshinglan. D. C.

ilnrrnn STATES ATENT OFFICE,

JACOB L. HAYVVARD, OF FRAMINGHAM, MASSACHUSETTS, ASSIGNOR OF TVO-THIRDS TO THOMAS O. SIMONTOLT AND THOMAS O. SIMONTON, JR.,

OF PATERSON, NEV JERSEY.

ROCK-PULVERIZER.

SPECIFICATION forming part of Letters Patent No. 323,674, dated August 4, 1885.

Application filed March 7, 1585.

To all whom it may concern:

Be it known that LJ. L. HAYWARD, a citizen of the United States, residing at Framingham, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Rock Pulverizers, of which the following is aspecication.

My invention relates to improvements in rock-pulverizers, in which I provide a disk revolving horizontally in conjunction with a casing, the inner surface of which is protected by steel bars against which the rock is thrown until pulverized.

The object of my invention is to thoroughly, effectually, and rapidly pulverize and reduce any and all substances, but more particularly quartz and other mineral-bearing rocks with little wear upon the substantial parts of the pulverizer.

To carry my invention into effect I have provided suitable mechanism to give the rocks or other substances a rotary motion of sufficient speed to throw them by their centrifugal force against the points and edges of the steel bars projecting from the inner surface of the casing from whence they are dashed back, striking` against others while passing to and fro, thus pulverizing by attrition as well as by direct contact with the steel bars. I attain this result by the ,mech anism illustrated in the accompanying drawings, in which- Figure 1 is a vertical section of the entire machine supported by a timber frame, x a: :o x. Fig. 2 is a horizontal section on line 3 3,

showing plan view of revolving disk and projections d d d d.

Rotary motion is given'to the vertical shaft y by means of the bevel-gears z z driven by a horizontal shaft.

Upon the top of frame-work w :c :v w, Fig. l, is a circular base with an annular chamber, C C, supporting a cylinder or casing, A, with a dome-shaped top having a circular oritice, F, for feeding.

Through the casing A are numerous openings, through which are placed, tangent to the curve, movable steel bars c a a a a a, held in (No model.)

position by set-screws f f f f f f. These bars should be from one to two inches square, and 5o project beyond the inner surface of the casing about two inches, and must be of sufficient number and near enough together so as to fully protect the inner surface of the casing A from direct contact with the rock. These bars present sharp points and edges against which the rock is continually hurled by the revolving concave plate c until broken and pulverized. As they wear off, they mayl be moved into the casing, so as to project as 6o far therein as may be found necessary to do the best work, and when worn out replaced. In t-he lower portion of casing A may be pla-ced perpendicular bars or projections b b b b b b, Figs. l and 2, in addition to barsaa.

Within the bottom of casing A is a revolving disk, B, Fig. l, keyed to the vertical driving-shaft y, having a removable concaveplate, c, Fig. 1, with radial arms or projections d d d, Fig. 2. Plate c is made removable, so 7o that it may be replaced when worn out. This disk B and plate c being a fraction smaller in diameter than casing A, I provide an an'- nular opening through which the pulver-ized material may escapeinto the circular chamber Othrough openings, one of which is shownin e, Fig. l, and thence through suitable spouts to the discharge.

The operation of the machine is as follows: Rock is fed into the chamber A through the 8c opening F to a depth of one foot, more or less. The disk B and curved plate e revolving at a high speed throw the rock or other hard substances to be pulverized with great force against the points and edges of steel bars a a placed within the casing, as aforesaid, where it is broken by the contact, and, rebounding, encounters other rock or material also thrown in the same manner, and thus the rock or material treated is rapidly reduced 9o to a powder, thus obtaining a maximum quantity of pulverized material with a minimum of wear upon the interior surface of the mill.

W'hat I claim as my invention, and desire to secure by Letters Patent, is

l. The casing A, provided with opening F,

and movable bars n a, Sulisiziniziliy :is :md and bars a. a, tho disk B, tho pluto c, having I'or tho purposes sut l'ortll. I firms d (l, the ohambor C, having openings e, 1o

2. In a rock-pu]vorizor, thohorizontzd disk :md shaft y, 1'11 combination, substantially :is 13, and romovabhl concur@ pluto f', provide@ :md for tho purpose sot forth. with arms (l (Z, in condlilizitioll with the Ca JACOB L. HAYVARD.

ing A, provided with Uw lnovadilo bars (L (l, XYHCSSCS:

T. W. RANDALL, Jr., EDWARD D. LINIiIroUM.

Substantially :is :ind fortlm purpose sot forth. The casing A., provided with opmiiug F, 

